Brittygotchi

So I've dropped my iD L a few times now and I didn't think it did anything but I just looked and saw that it said my tama is 1 year old but she is at an adult stage? This is the first time I've changed my tama at the tailor, when you change them, does it set it back to 1? I didn't notice this before so I'm not sure if it was like this the whole time she was growing up. Why is this happening? It has me quite worried :'(